Combined type-writing and computing machine.



E. THOMAS- COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION min-om. 16. 1914.

1,248,409. I Patented Nov. 27, 1917.

. UNITED STATES PATENT OFFICE.

npwARn-THomAs, or NEW YORK, N. Y., ASSiGNOR, BY MESNE ASSIGNMENTS, T UNDERWOOD COMPUTING MACHINE COMPANY, OFNEWIYORK, N. Y., A CORPO- BATION or NEW YoBK.

COMBI ED TYPE-WRITING AND COMPUTING ACHINE.

Specification of Letters Patent. Patented NOV; 27, 1917.

Application filed october 16,1914. Seria1No.86G,892. I

To all whomit may concern:

Be it known that I, ED ARD T OMAS, a citizen of the United States, residing in New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Combined Type-Writing and Computing Machines, of' which the following is a specification.

My invention relates to computing machines, and is'herein disclosed as 'applied to a combined typewi'iting and computing machine of the Underwood-Hanson type, wherein the numeral keys of the type-Writer set-up" pins on denomlnation members, or

rack bars, and the numbers represented by the pins thusset up are later carried into computing wheel's. Such typewriting machines are usually provided with a set of tabulating keys for rapidly positioning the carriage at any desired column, and are also usually provided with denomination selectors' or dogs which are settable along the typewriter carriage, and serve to determine into what computing wheels the numerals written 1n any column shall be carried.

the adjustments of the stop which ,is used to cooperate with the tabulating keysa'nd the adjustment of the tabulating stop to determine not only in what column the typewriter carriage shall be arrested,but also practically compels the denominationselectorto be properly adjusted with reterencethereto.

Other features and advantages will hereinafter appear,

In the accompanying drawing,

Figure 1 is a sectional side view of an Underwood-Hanson combined typewriting and computing machine, showing onlyqso much thereof as seems advantageous to illustrate my invention.

i Fig. 2 is a rear view of .a denomination-selecting dog and. some accompanying parts.

Fig. 3 is a side view of the same with a subtraction dog effective.

Fig. 4 is a perspective view thereof with a subtraction dog ineffective.

7 and rearwardly so that lower and upper case types 6 and 7 thereon print against a platen 8, which is carried in a traveling carriage 9.

Said carriage is fedalong at every operation of a numeral key, andforthis purpose is provided with a rack 10 adapted to mesh with a pinion 11, said pinion being connected to the usual esczipementwheel 12 on avhich the usual escapement'dogs 13 and 14:

are made effective through the usual universal bar 15 operated by the usualheels 16 on the type-bars 5. For positioning said carriage rapidly at any point in the travelthereof, the machine is provided with decimal tabulating keys 17 on the front ends-of key levers 18, the rear ends of said levers be 'ing adapted, when a key is depressed, to raise the corresponding plunger 19 so that the upper end 20 thereof forming a counterstop rises into the path of a column stop 21 mounted on the usual rack bar 22 of the Unv derwood typewriting machine. One objectof my invention is to simplify Whenever one of the keys 17 is depressed it releases the typewriter carriage permitting said carriage to travel along until arrested by the striking of a column stop 21 against the upper end of a projected counter-stop 20. To accomplish this, each of the plungers 19' is provided with a heel 23, which is adapted to raise a sniall universal bar 24: pivoted on a shaft 25, so that the rock arm 26 on the forward end ofsaid universal bar will draw down ag link, 27 and thereby rock an arm 28, so as to cause a roll '29 on the forward end of said arm to lift the rack 10 out of mesh with the'pinion 11, said rack" for this purpose being pivoted on the carriageat 30 As the typewriter carriage travels along, it raises into effective position one after an other a series of denomination or computing members 31, so that the numeral key operated at any moment may depress or set up on the computing member then in cited tive position the appropriate pin 32, each pin on any computingmember 31 represent ing a digit. The means for doing this are shown in the application of Hans Hanson,

No. 626,550, filed May 11, 1911, and form no novel part ofthe present invention, but

include-a pendant 33 on each numeral key,

which'ipendant, as it descends, strikes a rock arm "'34 so as to rock a shaft'35 to which said arm is fast, thereby operating its pinsetting linkage 36, causing the lower memsponding to said linkage.

After a series of pins have thus been set up on the various computation members, they are caused to rotate computing wheels 38, each to an extent dependent upon the key depressed. For this purpose, the com puting wheels are provided with the usual pinions 39, which mesh with racks 40 on the forward end of the computation bars 31, and said pinions are rotated by the forward movement of .the computation bars. This forward movement is brought about by means of a cross bar 41 forming part of a general operator, said cross bar being adapted to be moved forward and strike any depressed pins 32 in such a way as to carry the computation bars forward. The gen eral operator also comprises side bars 42, said bars including racks by which said operator is driven, the driving means being an idle pinion 43, which cooperates with the usual segment 44.

For raising the computation members 31 to effective position, the typewriter carriage is provided with one or more dogs 45, which are adjustable thereon, and when in effective position ride under and raise one after another a series of jacks 46, there being one jack for each computing wheel 38, and correspondingly one for each computation member 31. When a dog 45 stands under any jack 46, said jack depresses a rod 47 at the rear end thereof, so as to rock downwardly the rear end of a lever 48, causing the front end 49 thereof to lift the appro-v priate computation member 31, thereby bringing the pins thereon within the range of the pin-setting linkages 36.

Since the typewriter carriage travels from the right toward the left, while numbers have to be inserted in the computing wheels, beginning at the left and then seriatjm toward the right, a transposing device 50 is provided for causing the carriage in its letter-feeding movement to raise the computation members one after another to effective position, beginning with the left-hand one.

The dogs 45 are usually cams pivoted at 51, so as to be effective on the jacks 46 in one direction only as they travel past them. The pivots 51 are formed in blocks 52 which are pivoted on the usual rod 53 on the carriage of the typewriter, said rod comprising grooves 54 and 55 which cooperate with a spring ball detent 54 in the block 52 to hold the block approximately in either effec tive position (see Fig. 1) or swung up to mefi'ective position, as shown in dotted lines in Fig. 3. The detent 54 is not sufiicient to locate the blocks 52 so as to hold the cams 45 thereon in effective position; but in the adding zone, the blocks 52 are supported one roll 56, said roll being mounted on swinging arms 57, so that it may be swung position, or inwardly, as shown in-Fig. 1, at effective osition. When in effective position, the silencing roll 56 supports a block 52, which is in the adding zone, by a cam roll 58 thereon, thereby lifting said block to carry its cam 45 to effective position.

The silencing roll 56 is tapered at its ends, and is of the type shown in the application of John N. Thornton, Serial Number 690,488, filed April'13, 1912, being held normally in effective position by a spring 59.

In order to hold any block 52 against sliding on the rod 53, the blocks are prooutwardly, as seen in Fig. 3, to silencing.

vided with means for coiiperating with the upward to the dotted line position shown in Fig. 3. When a block 52 ,thus engages a column stop, it is held against sliding, and the slot 60 is of such a height that sufficient freedom of vertical movement is given to the blocks to permit them to be dropped down to ineffective position, as seen in Fig. 3, but the slot is cut off at such a height that it is impossible for the block to drop far enough to interfere with any other mechanis While the wings 61 on the block are not necessary, they are convenient in setting the block, because they enable the operative to approximately locate the block with one of said wings resting on a column stop, and then sliding the block along until it drops into place onto a column stop. To facilitate this, the slot may be made slightly V-shaped at the point where it would naturally first numbers on the same computing wheels only a .few wheels apart. The disadvantage of computing two setsof numbersso close together is that one set of" numbers is likely to add up to a sufficiently large number to overlap into the number in the next column, with the result that extricably confused.

Further, if two column stops are set so close together that there are fewer letter-' spaces between them than there are'decimal stops 20, the carriage may be stopped at'an lncorrect position under some circumstances.

' This is so because if a certain column stop is I bar 24 is liftedby a tabulating key, the shaft 65 on which the silencing V is supported rearwardly, with the result designed to arrest the carriage at a given column when the units decimal key-is de-.

than the most'remotedecimal stop would manifestly be within range also of the decimal stops, the result being that somedeci-, mal stops will cooperate with-one column stop, and some decimal stops will cooperate with another column stop in arresting the carriage,'so1the typist .will be at'sea as to' what is going to happenv in using the tabulating device. here such wings as I have providedfare associated with the column stops, it is impossible to make mistakes of;

thls character.

that the block 52 drops down to ineffective position clear of the dogs 45.

The machine may also include a platen shift kev adapted-to determine whether the lower case types 6 or the upper case types 7 shall be efiective to print on the platen. Said key is of the usual type, and operates at. its rearward end. a bell-crank 67 by means of an upstanding arm 68 to lift said platen bymeans of the usual rail '69 on which the wheel 70- runs. Whenever the platen shift key is depressed to raise the'rail 69, a silencing arm 71 fast 'to said bell-crank 67, and

extending to the rear thereof, is rocked downwardly, and thereby causes a follower 72 thereon to cam'the roll'56 to-inefl'ective position, by means of a cam 73 on an arm fast to the shaft 65.

The mechanism may also include sub- Jtraction means, such as are shown in the application of Ogden Minton, Serial Num ber 797,714, filed October 28, 1913, which is of the complementary type, the connections being'such that'-when subtraction is being done, each key operated, instead of depressing the key it does in addition, de-

the computation is in-- pressed, any column stop located nearer presses a Key representing the complement of the number set up in addition.

Certain other connections are made ei? fecti-ve whenever the subtraction means )ecomeseffective,ibut'the detailsof the sub 1 traction device are shown in the applicaa 'tion of Ogden Minton, above referred to,

, and it is not. believed to be necessary to re cite ,them'herein The subtraction is made efiective by a bar75 which normally held in its ineffective or addition position by a dog 7 6. Whenever the dog 7 6 is released in the manner to be described later, the release of this dog permits the spring 77 to draw the "subtraction bar 78 rearwardly, causing said bar to be effective on all the 9 pins 32 to set them-to effective position, and at the same time shifts the rock shafts 35 so that they operatepin-setting bars 36 complefinentary to those they previously operate The dog 76 is moved to its ineffective position by a spring 79 but is normally held in effective position by connections not material to the present invention, it being sufficient to say that said connections are under the control of a vertical rod 80, which is controlled by a dog Sladjacent the casing- 82 of the decimal stop frame, said dog being column stops 21.

adapted to be struck by specially formed The connections are provided so a column stop 21 may pass the dog 81-idly on the return movement of the carriage,, Y but on the forward movement of. the (arriage'an extension 83 on the column stop is ,efiective to operate the dog 76 through the vertical rod 80. The extensions-83 of the I column stops to be thus effective, asshown most clearly in Fig.3, are triangularextensions of said stops so that said stops on one side are of the normal length, but .on the opposite side are extendedas at 83. This construction enables a single set of columnstops to be used in either addition or subtraction, because any coluinn stop with its,

extension 83 uppermost will beefiect'ive as anordlnary mere adding column stop, while with said extension downward it becomes effective as a subtract on-setting dog. The

result is that any column stop may be set to addition or subtraction, and no matter which position it is setting it serves to accurately locate the tappet 45 at theexact letter-space required.

Variations maybe resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I"

claim 1. In a combined typewriting and com putingmachine, the combination with numeral keys and a traveling carriage,of computing wheels, a column stop settable on said carriage,.tabulating keys for positionwhich it remains connected with said stop,

a device adapted to restore said selector from its second inefiective position to effective; position when it reaches the adding zone, and r column stop for determining a typewriting means adapted to hold said device in its second ineffective position while passing through said adding zone whenever a tabulating key is depressed.

2. In a combined typewriting and computing machine, the combination with numeral keys and a traveling carriage, of computing wheels, a column stop settable on said carriage, a denomlnation selector coinprising.

a block settable along said carriage, two walls on said block to cooperate with said column stop and hold said selector against sliding, and extensions from said walls adapted to cooperate with said column stop to support said'selector an unusual po sition when. inaccurately located with reference to said column stop.

3. In a combined typewriting and computing machine, the combination with numeral keys and a traveling carriage, of separately settable denomination selectors on said carriage, a gang of computing wheels, and means for preventing said selectors from being-located closer together than the numher of wheels'in a gang. 7 y

4. In a combined typewriting and computing machine, the combination with numeral keys and a traveling carriage, of col- 'umn stops for positioning said carriage, a series of denominational counter-stops, separately settable denomination selectors adapted to be held in position by said stops, and

means for preventing two selectors from being set closer together than the number of letter-spaces covered by said denominational counter-stops.

5. In a combined typewriting and computing machine, the combination with a traveling carriage and a denomination selector, of an array of denomination stops for positioning-said carriage,a column stop for positioning said selector, and win s assoclated with said. selector extending t e wldth of puting mechanism, of typewriting mechanism cooperating with said computing mech-' I anism, to effect a combined typewritmg and computing action, and including a traveling Tc arriage, a denominational selector for said computing mechanism, adjustably mounted on said carriage, and a separately settable tion'with a 1etter-feeding carriage, of a denomination selector including a block slidable on said carriage, a column stop independently settable to select a column for said carriage, and an extension of said block adapted to slidably engage said stop to permit said selector to be swung relatively thereto into and out of effective position on .said carriage, and in both positions adapted to positively hold said selector against sliding along the carriage.

9. In a computing machine, the combina tion with a letter-feeding carriage, of a denomination selector including a block slidable, on said carriage, a column stop independently settable to select a column for said carriage, and an extension of said block adapted to slidably engage said stop to permit said selector to be swung relatively thereto into and out of eifective position on said carriage, and in both positions adapted to positively hold said selector against sliding along the carriage, said selector also shiftable to a third position in which it is ineffective, and in which it may be slid along the carriage independently of the stop.

EDWARD THOMAS.

Witnesses:

W.- O. WESTPHAL, DELOS G. HAYNES. 

